Variation of spontaneous somatic mutation frequency in the stamen hairs of Tradescantia clone BNL 02

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Variation of spontaneous somatic mutation frequency was studied in the stamen hairs of Tradescantia clone BNL 02 heterozygous for flower color (blue/pink; the blue color being dominant), one of the most stable clones in terms of spontaneous mutation frequency. Young inflorescence-bearing potted plants of this clone were grown under several different controlled environmental conditions, and the spontaneous pink mutation frequency in the stamen hairs was scored daily for three (partly two) weeks. The average number of hairs per stamen decreased as inflorescences became older, especially during the first one week or so after the inflorescences initiated flowering. The average number of cells per hair also decreased with the age of inflorescences, but the decreases were much smaller than those in the number of hairs. On the other hand, the spontaneous mutation frequency expressed as the number of pink mutant events per 10(4) hair-cell divisions did not show any significant changes with the age of inflorescences. The spontaneous mutation frequency varied, however, depending on the controlled environmental conditions and showing nearly significant negative and positive correlations with average temperature and diurnal temperature difference, respectively, although the variation observed was very much smaller than those reported earlier in a temperature-sensitive mutable clone KU 20 and also smaller than those in other clones.

Variation of spontaneous somatic mutation frequency was studied in the stamen hairs of <i>Tradescantia</i> clone BNL 02 heterozygous for flower color (blue/pink; the blue color being dominant), one of the most stable clones in terms of spontaneous mutation frequency. Young inflorescence-bearing potted plants of this clone were grown under several different controlled environmental conditions, and the spontaneous pink mutation frequency in the stamen hairs was scored daily for three (partly two) weeks. The average number of hairs per stamen decreased as inflorescences became older, especially during the first one week or so after the inflorescences initiated flowering. The average number of cells per hair also decreased with the age of inflorescences, but the decreases were much smaller than those in the number of hairs. On the other hand, the spontaneous mutation frequency expressed as the number of pink mutant events per 10<sup>4</sup> hair-cell divisions did not show any significant changes with the age of inflorescences. The spontaneous mutation frequency varied, however, depending on the controlled environmental conditions and showing nearly significant negative and positive correlations with average temperature and diurnal temperature difference, respectively, although the variation observed was very much smaller than those reported earlier in a temperature-sensitive mutable clone KU 20 and also smaller than those in other clones.<br>

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  • Genes & genetic systems

    Genes & genetic systems 71(3), 159-165, 1996-06

    The Genetics Society of Japan

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各種コード

  • NII論文ID(NAID)
    10003759813
  • NII書誌ID(NCID)
    AA11077421
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    13417568
  • NDL 記事登録ID
    4163717
  • NDL 雑誌分類
    ZR1(科学技術--生物学)
  • NDL 請求記号
    Z53-W539
  • データ提供元
    CJP書誌  CJP引用  NDL  IR  J-STAGE 
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